fix(dropdownfield): tree depth not restored in design dialog

Author: btry

templates/field/dropdownfield.html.twig

@@ -114,7 +114,7 @@
 
         {{ fields.numberField(
             'show_tree_depth',
-            item.fields['_show_tree_depth'],
+            item.fields['_tree_max_depth'],
             __('Limit subtree depth', 'formcreator'), {
                 label_class: 'col-xxl-4',
                 input_class: 'col-xxl-8',